DPM and LES

We are working CFD modelling of hydrocyclones and are using LES for turbulence modelling. For simulating the particle trajectories we use DPM. When we use DPM with other turbulence models, in the "Display' "Particle Tracks" screen when we click "report type" as "summary" and the "report to" option as "file" then the "write" option automatically is displayed. This basically gives us the provision to write the results in a file and save it so that we can view it later. But this is not so in the case of LES with DPM . Even after the "report to file" option is clicked, the write option is not displayed. hence we are not able to write the results on to a file. also in the stochastic tracking model of DPM the number of tries option doesn't get on. Anyone of you have come across such problems. Please help R.sripriya